Electrokinetic and Chemical Aspects of Transport of Chloride Brines Through Compacted Smectite Layers at Elevated Pressures (Electroosmosis, Streaming, Conductivity)

Solutions of NaCl and NaCl-CaCl were forced through clay plugs made by compacting the 0.2 to 2.0 micron size fraction of Cheto montmorillonite. The concentration of NaCl solution was either 1.10 m or 1.087 m, and that of NaCl-CaCl(,2) solution was 0.92 m in NaCl and 0.075 m in CaCl(,2). Clay plug thicknesses ranged from 0.32 to 0.5 centimeters. The clay plugs were prepared differently in order to obtain different fabrics. Six experiments were carried out. It took five to ten weeks to achieve constancy of effluent chemical composition and of streaming potential. Confining pressure (CP) in these room temperature experiments was 5000 pounds per square inch (psi), differential hydraulic pressure (DHP) across the clay was 2000 psi, and mean hydraulic pressure (MHP) was 2300 psi. These values of CP and MHP are approximate for a depth of 5000 feet in sedimentary basins.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Geology

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Demir, Ilham

• Geochemistry

Identifier

(UMI)AAI8502126

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/71135